since version 1.3.619 (to be released) it is possible to create a skin with a really small lcd (only preset name is supported) and no other displays. Alternatively you could disable all lcd at once even now. It happens because nebula is supporting things coming from upcomng product nebula4, to be released on november 2014 [my marking]. For this reason we are constantly improving the skinning engine, and also old nebula3 is taking advantage of this.
If you find a skin developer tell him to contact me and I'll provide syntax, so when 1.3.619 will be release everything will be ready

Is it possible to make a "wish list" for features in Nebula 4, or have you already "locked" the list of features and just working day and night to reach your deadline?

With all the nice skins coming up lately, it would really have been a great feature to be able to right click and assign the knobs to MIDI, so that we could have the Nebula sound and hardware feeling turning a real knob.

Is it possible to see the list of what Nebula 4 will bring to the table?

yes you could.... but be aware the product is completely planned, I mean we have a gantt on it so yes, everything is locked... I could tell you if the feature is already included or not.
For example, we can't add numeric editing on parameters, which is a limitation coming from our core engine which will not be modified. The product will remove a lot of current limitations, but not everything. It's all about usability and less about the engine (the engine is pretty mature: it's not perfect, but it features something never released by other developers; ie compressors are not perfect but they fill a gap in audio industry).

The metering has been a small annoyance for me as it hasn't seemed consistent. I get around it by putting a VU meter before and sometimes after. I'm excited to see what "Sample Accurate Peak Level and RMS Metering" really means.

I've read Henry Olonga discuss his hopes for a 64-bit NAT capability. Is that also on the horizon?